求翻译：科斯认为，单方面征税是不对的。即使征税，也应该建立一种双重的征税制度。因为甲对乙的侵害对乙来说是损失，但不允许甲侵害乙，同样会对甲造成损失。但科斯认为很难获得税收制度所需要的数据。就他的目的而言，税收方法也不一定带来最佳结是什么意思？

Coase argued that the unilateral taxation is wrong. Even if the tax should also establish a dual system of taxation. A B against B for the loss, but not A against B, the same would be A losses. But Kos is difficult to obtain the data needed by the tax system. For his purposes, tax is not necessarily

The was of the view that it is not unilateral tax. Even if taxes should also be established by a two-tier system of taxation. Because of the violation (a), (B) to (b) of that loss is, but it does not allow a against b, the same will result in a loss. But the thought that it was difficult to obtain t

Coss believed that, the unilaterally taxation is not right.Even if levies taxes, also should establish one kind of dual taxation system.Because the armor is loses to the second grade violation to the second grade, but does not permit the armor violation second grade, similarly can cause the losses t

Kos believes that unilateral taxation is not right. Even if the tax should also establish a dual tax system. Against is loss for b of a on b, but does not allow a against b, also on a loss. But Kos found it difficult to obtain data required by the tax system. For his purposes, tax may not always bri

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